Post project 26: Raspberry-Pi-voltmeter

February 7, 2014 | 15:36

Post project 26: Raspberry-Pi-voltmeter

Just a few additional components are needed to turn a Raspberry Pi into a
DC voltmeter capable of reading up to 5 V and displaying the results in color
on a monitor. The entire display area can be used, which makes the project
an ideal basis for demonstrations, for example in schools.

Just a few additional components are needed to turn a Raspberry Pi into a
DC voltmeter capable of reading up to 5 V and displaying the results in color
on a monitor. The entire display area can be used, which makes the project
an ideal basis for demonstrations, for example in schools.
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The program that accompanies this project
is written for revision 2 of the Raspberry Pi
in Python: a good three-part introduction to
this language for people more used to BASIC
has been published previously in Elektor [1].
There are two versions of the code. In both
cases the Raspberry Pi communicates with an
A/D converter chip using a small number of
GPIO pins and displays readings on its screen.